Sheet perforating and joining system

ABSTRACT

The disclosure relates to perforating and uniting sheets of materials together and particularly paper sheets so that a substantially firm junction is achieved. This is done by forcing into the material while it is being held in position an interrupted sawtooth or serrated arrangement which will result in a junction between the fibrous structure of the various superimposed layers. This is done by passing several layers of the paper material between rollers, one of the rollers having an interrupted perforating member extending longitudinally across the roller but transversely of the direction of movement of the laminations. The perforator is provided on each side with spring pressed holder members and the meeting roller has a recess extending transversely of the moving laminations but longitudinally of the roller to receive the perforating interrupted sawtooth arrangement.

United States Patent 172] inventor George Gerard Point Pleasant, NJ. :1Appl. No. 718,776 122] Filed Apr. 4, 1968 [45] Patented July 6, 1971[73] Assignee Jiffy Manufacturing Co.

Hillside, NJ.

[54] SHEET PERFORATING AND JOINING SYSTEM 5 Claims, 6 Drawing Figs.

Primary ExaminerWayne A. Morse, Jr. AltorneyrArthur B. Colvin and MarkT. Basseches ABSTRACT: The disclosure relates to perforating and unitingsheets of materials together and particularly paper sheets so that asubstantially firm junction is achieved.

This is done by forcing into the material while it is being held inposition an interrupted sawtooth or serrated arrangement which willresult in ajunction between the fibrous structure of the varioussuperimposed layers.

This is done by passing several layers of the paper material betweenrollers, one of the rollers having an interrupted perforating memberextending longitudinally across the roller but transversely of thedirection of movement of the laminations. The perforator is provided oneach side with spring pressed holder members and the meeting roller hasa recess extending transversely of the moving laminations butlongitudinally of the roller to receive the perforating interruptedsawtooth arrangement.

SHEET PERFORATING AND JOINING SYSTEM SUMMARY OF THE INVENTION It isamong the objects of the present invention to provide a simple systemand procedure for joining together sheets of paper.

Another object is to provide a unitary laminated paper structure whichhas been substantially integrally joined together with the fibers of thevarious paper sheets substantially interlocked with one another.

Still further objects and advantages will appear in the more detaileddescription set forth below, it being understood, however, that thismore detailed description is given by way of il- Iustration andexplanation only and not by way of limitation, since various changestherein may be made by those skilled in the art without departing fromthe scope of and spirit of the present invention.

In accomplishing the above objects, it has been found most satisfactoryto assemble together in three, four, five or more laminations a seriesof sheets of paper of different textures and of different thicknessesand to form a united laminated structure by perforating the sheets insuch a way that they will substantially attach themselves one to theother.

Less preferably, the invention may be applied to other types of sheetmaterial or among the laminates there may be pro vided plastic sheetswhich would be joined by adherence of the adjacent fiber sheets.

Preferably, the junction results as a result of passing the laminated orsuperimposed sheets between two rollers, a male roller containing atransverse serrated or perforating member with interrupted teeth orprongs and with the female member receiving a transverse recess intowhich the perforating element may be received. This perforating may takeplace at intervals of 360 where only one perforator blade is employed orat shorter intervals depending upon the angular spacing of theperforating members and also the diameter of the rolls.

It is important that when the perforating takes place the laminatedstock be held down by spring fingers against the base female cylinder.

The slight arcuate movement of the perforating blade results in aninterlocking of the paper fibers or other fibers of the sheet materials.

BRIEF DESCRIPTION OF THE DRAWINGS With the foregoing and other objectsin view, the invention consists of the novel construction, combinationand arrangement of parts as hereinafter more specifically described, andillustrated in the accompanying drawings, wherein is shown an embodimentof the invention, but it is to be understood that changes, variationsand modifications can be resorted to which fall within the scope of theclaims hereunto appended.

In the drawings, wherein like reference characters denote correspondingparts throughout the several views:

FIG. 1 illustrates a top perspective view of a roll of laminated paper,the laminates of which has been joined.

FIG. 2 represents a top perspective view of a portion of the laminatedsheet of FIG. 1.

FIG. 3 is a separated view indicating the separated laminates of FIGS. Iand 2.

FIG. 4 is a transverse sectional view upon the line 44 of FIG. 2 upon anenlarged scale as compared to FIG. 2.

FIG. 5 is a diagrammatic side sectional view showing the perforatingrolls without the laminated structure passing therethrough, but in theposition in which the perforation will take place.

FIG. 6 is a diagrammatic fragmentary side elevational view showing theinterrupted perforating device upon an enlarged scale as compared toFIG. 5.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. I to 4 thereare four laminations, B, C, D and E shown by way of example, since agreater or lesser number may be used and the laminations may be of anyfibrous material with or without plastic or other nonfibrous sheets.

In FIG. 1 these laminations, after "the perforated juncture, are joinedtogether in a roll A on the spindle F.

The perforations 40, 41, 42 and 43, which join the sheets B, C, D and Etogether, may be made by means ofa perforating blade such as isindicated in FIG. 6. This perforating blade has a solid portion 20 withdownwardly projecting teeth 22 closely spaced together and interruptedat 21.

The perforating blade K of FIG. 6 is on the periphery of the roll ofcylinder G and it projects beyond the periphery of the cylinder G. Oneach side of the blade K there are the presser members L backed by thecoil M, which are received in the recesses or cavities N.

Opposite the blade K will be the recess .l in the roller H. As indicatedby the sides of the recess J the blade K will not only penetrate andperforate but will also have a slight angular motion due to the rotationof the roller 0 while penetrating the laminations B, C, D, and E.

The result of the lamination is best indicated in FIG. 4. as the teeth22 are withdrawn, the fibers will spring back into position and willtend to lock into the surface and into the body of the sheets. In FIG. 4is shown this result diagrammatically with the sheets from bottom to topeach having a smaller perforated area and with the fibers of the highersheet extending into and engaging the fibers in the next adjacent sheet.

It will be noted that the junctions at 29, 30, 31 and 32 will each haveabout the same depth with a predetermined length of tooth 22 and thatthe curved sides or conical sides will extend into the next adjacentsheet in the: perforating zone.

As indicated, the layers 24 and the topmost layer 23 will e securelylodged together by the resilient fibers in the perforating areaindicated at 25, 26, 27 and 2B. The rolls G and H may be spaced thedesired amount to take care of the laminations and the upper and lowerroll may be supported upon resiliently connected trunnions to permit therolls to accommodate different thicknesses of lamination.

Desirably, the entire paper stock should be substantially unified by theperforation junctions as indicated in FIGS. I, 2 and 3.

As many changes could be made in the above sheet perforating and joiningsystem, and many widely different embodiments of this invention could bemade without departing from the scope of the claims, it is intended thatall matter contained in the above description shall be interpreted asillustrative and not in a limiting sense.

It will be noted that the sharp teeth 22 of the edge 20 of the blade inFIG. 6 are at least twice as high as the width of their base and thatthe space 21 between the closely spaced group of teeth, which may befive in number, is at least equal to or more than the width of two ofthe teeth 22 at their base. The opening to receive the lower end of theblade K as shown in FIG. 5 rotates without touching the walls of therecess J so as to form the necessary perforations and enlargement of theelevated portion of the paper portions, as indicated in FIG. 4, withoutpenetrating the surface.

The lower penetrations, as indicated in FIG. 4, have rounded upperportions or rounded and flat top portions 29 and 30 projecting into thenext upper lamination. There is, therefor, only visible on the outsideof the lower face the slightly indented lower face 28, as indicated inFIG. 4.

The knife K, in rotating as it penetrates, will give the unusualconfiguration of FIG. 4, which results in a direct binding of the sheetstogether without the teeth penetrating through the entire series oflaminations because of the spacing of the tooth edge K from the bottomof the recess J, the sides of which have about the same angle as thesides of the sharp teeth 22.

Having now particularly described and ascertained the nature of theinvention, and in what manner the same is to be performed, what I claimis:

l. A perforating machine for joining together at intervals laminatedsheets of fibrous paper strips comprising upper and lower rollers,spaced apart at their most adjacent point where the sheets are passedbetween the rollers, the upper roller having a thin flat blade mountedtransversely therein, perpendicular to the axis of the roller, the outeredge of the blade having spaced groups of sharp triangular teeth, eachtooth having a height and projection much greater than the width of eachtooth at its base and said teeth being closely spaced in each group andspaces between said group being about twice the width of the width of atooth and trapezoidal shaped recesses extending transversely across thewidth of the lower roller and matching and receiving said blade andpermitting the blade to rotate within the recess without touching thesides of the recess, the sides of the recess being divergent outwardlyand said blade being positioned so as only to partly penetrate thelaminated sheets.

2. The machine of claim 1, said teeth being provided with sharp edges.

3. The machine of claim 1, and means to cause the laminated sheets topass under a moving perforating blade and means to cause said blade topartake of a slight angular movement to complete ajunction of thesheets.

4. The machine of claim 1, said sheets being paper laminations ofdifferent textures and thickness.

5. The machine of claim 1, and means to hold said laminated stockagainst the lower cylinder having the recesses.

1. A perforating machine for joining together at intervals laminatedsheets of fibrous paper strips comprising upper and lower rollers,spaced apart at their most adjacent point where the sheets are passedbetween the rollers, the upper roller having a thin flat blade mountedtransversely therein, perpendicular to the axis of the roller, the outeredge of the blade having spaced groups of sharp triangular teeth, eachtooth having a height and projection much greater than the width of eachtooth at its base and said teeth being closely spaced in each group andspaces between said group being about twice the width of the width of atooth and trapezoidal shaped recesses extending transversely across thewidth of the lower roller and matching and receiving said blade andpermitting the blade to rotate within the recess without touching thesides of the recess, the sides of the recess being divergent outwardlyand said blade being positioned so as only to partly penetrate thelaminated sheets.
 2. The machine of claim 1, said teeth being providedwith sharp edges.
 3. The machine of claim 1, and means to cause thelaminated sheets to pass under a moving perforating blade and means tocause said blade to partake of a slight angular movement to complete ajunction of the sheets.
 4. The machine of claim 1, said sheets beingpaper laminations of different textures and thickness.
 5. The machine ofclaim 1, and means to hold said laminated stock against the lowercylinder having the recesses.